disabling(silence/stun/snare/knock-up) Leblanc after she uses her Distortion will stop her from casting it again.
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529

Try to stay behind minions so that her chain won't be able to hit you.Report

458

Find out which spell she upgrade as first, Q or W. When she max. Q - push lane hard, she has no waveclear. When she max. W - stay away from range of her W all the time, try to make her Distoriton useless.Report

When LeBlanc is brought below 40% health, she instantly becomes stealthed for half a second. When the stealth fades, she creates a Mirror Image of herself that can move, but deals no attack damage, has 53 + 17 x level less health, and lasts for up to 8 seconds. This can only occur once per minute, regardless of cooldown reduction. The illusions autoattacks will proc on-hit effects including damage.Leash Range: 1125 (estimate)

Sigil of Silence

Q

Active: LeBlanc projects an orb towards her target, dealing magic damage and marking the target for 3.5 seconds. If the target takes damage from one of LeBlancs abilities, the mark will trigger, dealing magic damage.Cooldown: 6 secondsRange: 700Projectile Speed: 2000

Active: LeBlanc rapidly dashes to a target location, dealing magic damage to units near the location. In the following 4 seconds, she can activate Distortion again to blink back to her starting location.Range to Center of AoE: 600Radius of AoE: 250

Active: LeBlanc flings illusionary chains in a line towards a target location. If it hits an enemy unit, it will deal initial magic damage and leash to it, slowing their movement speed by 25% for 1.5 seconds. If the target remains leashed after the 1.5 seconds, the target takes additional magic damage and is rooted for a few seconds.Cost: 80 manaCooldown: 14/13/12/11/10 secondsRange: 950Leash Range: 1000

Mimic: Sigil of Silence: 100/200/300 (+0.6 Ability Power) damage once on impact and again if the mark is detonatedMimic: Distortion: 150/300/450 (+0.9 Ability Power) damage on impactMimic: Ethereal Chains: 100/200/300 (+0.6 Ability Power) damage once on impact and again if the target is rooted